JPH07282452A - Optical pickup - Google Patents

Abstract

PURPOSE:To facilitate inclination adjustment work by providing a fine adjustment means on an optical pickup equipped with an optical axis inclination adjustment mechanism of an objective lens. CONSTITUTION:When a screw 17 is screwed in from the state after adjusting inclination, a spacer 18 is pushed upward in the direction of an optical axis. A movable part supporting member 8 is moved sliding on the spacer 18 in two directions of an upward direction of the optical axis and a spherical direction because a surface 18b in contact with a lower inclined surface 8C of the spacer 18 is formed to be the same inclined surface. At this time, deflection of a leaf spring 14 is increased, and its pressing force to the member 8 is also increased, and hence the member 8 is brought into contact with a spherical seat of an actuator 9c. When two screws 17 are screwed in by an equal amt. to each other, the member 8 is passed through a principal point of the objective lens, and is turned around an axis parallel to a track direction. By such a screw fitting operation of the screws 17, the inclination of the optical axis of the objective lens 1 can finely be adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk for projecting a light beam onto an optical recording medium such as an optical disk or a magneto-optical recording medium to record information or reproduce recorded information. Regarding pickup.

[0002]

2. Description of the Related Art Generally, in an optical pickup, an optical system such as a light source and a beam splitter and a photodetector are attached to an optical pickup body, and an actuator having an objective lens is attached to the optical pickup body to emit light from the light source. The light is projected onto the recording medium through the objective lens, and the reflected light is received by the photodetector through the objective lens.

In such an optical pickup, in order to accurately record and reproduce information, it is necessary to set the optical axis of the objective lens perpendicular to the recording medium. For this reason, for example, Japanese Patent Application Laid-Open No. 59-223953 proposes a mechanism for adjusting the inclination of the optical axis of the objective lens as shown in FIGS. 5 (a) and 5 (b). Figure 5 (a)
Also, in the optical axis tilt adjusting mechanism for the objective lens shown in FIG. 5B, a spherical support mechanism is configured by the spherical projection 30a formed on the actuator 30 and the spherical seat 31a formed on the optical pickup body 31, and the actuator 30 is provided with the spherical support mechanism. On the other hand, two fixing screws from the optical pickup body 31 side along the optical axis direction
32a, 32b and two adjusting screws 33a, 33b are screwed together, and fixing coil springs 34a, 34b are fixed to the fixing screws 32a, 32b on the optical pickup body 31 side, and between the actuator 30 and the optical pickup body 31. Wind the adjusting coil springs 35a and 35b around the adjusting screws 33a and 33b using
While the actuator 30 is being pressed against the optical pickup body 31 by 34a and 34b, the actuator 30 is tilted through the spherical support mechanism by the adjusting screws 33a and 33b, and the objective lens
The tilt of the optical axis of 1 is adjusted. The spherical projection 30a and the spherical seat 31a are formed with the center of the objective lens 1 as the center, and the position of the light spot does not deviate from the optical axis by adjusting the inclination of the optical axis of the objective lens 1.

Further, as another mechanism for adjusting the inclination of the optical axis of the objective lens, Japanese Patent Laid-Open No. 64-46232 has been proposed. The technique will be described below. FIG. 6 shows JP-A-6
It is a mechanism for adjusting the inclination of the optical axis of the objective lens described in Japanese Patent Publication No. 4-46232. To the holder 2, one end of an objective lens 1, a focusing coil 3, a tracking coil 4, and a wire 7 for movably supporting the objective lens in a predetermined direction are fixed. By bonding the other end of the wire 7 to the wire receiver 40 and the wire substrate 41, the objective lens 1
Is displaceably supported in the tracking and focusing directions.

On the other hand, a rising portion 43 is integrally formed on the base 42 so as to face the side surface to which the tracking coil 4 of the holder 2 is fixed, and these rising portions 43 cooperate with the focusing coil 3 and the tracking coil 4. A permanent magnet 44 for driving the objective lens 1 in the tracking direction and the focusing direction is provided by being fixedly adhered to each, and a screw for attaching the base 42 to the optical pickup main body (not shown) with the lower surface thereof as a reference surface 45. A hole 46 and an opening 47 for the optical path to the objective lens are formed.

An adjusting piece 48 is interposed between the wire receiver 40 and one rising portion 43 of the base 42 facing the wire receiver 40. A boss 49 is formed on the adjustment piece 48, and the boss 49
49 is fitted in a fitting hole 50 formed in the rising portion 43 so that the adjusting piece 48 can be rotated with respect to the rising portion 43 around an axis line substantially orthogonal to the optical axis passing through the rear principal point of the objective lens 1. The surface of the adjustment piece 48 that contacts the wire receiver 40
51 is formed on a cylindrical surface passing through the rear principal point of the objective lens 1 and having the axis in the tracking direction as the central axis. A concave curved surface 52 is formed on the wire receiver 40 so that it can slide on the cylindrical surface of the adjusting piece 48.

The wire receiver 40, the wire substrate 41, and the adjustment frame
48 is a rising portion 43 by the fixing screw 54 through the washer 53.
The wire holder 40 and the wire board 41, which are fixed to the adjustment piece 48 with the fixing screw 54 loosened, are displaced with respect to the adjustment piece 48, and these are integrally displaced with respect to the rising portion 43 to thereby objective lens. The tilt of the optical axis of 1 is adjusted.

[0008]

However, the various conventional examples described above include the following problems.
In the optical axis tilt adjusting mechanism of the objective lens described in Japanese Patent Laid-Open No. 59-223953, a spherical support mechanism is provided between the actuator and the optical pickup body, and the entire actuator is tilted with respect to the optical pickup body to tilt the optical axis of the objective lens. Since the tilt of the axis is adjusted, the amount of shake with respect to the tilt adjustment angle of the actuator increases, and therefore it is necessary to form the actuator and the optical pickup main body in anticipation of this. There is a problem in that the height dimension becomes large and the device becomes large.

In the mechanism for adjusting the inclination of the optical axis of the objective lens described in Japanese Patent Laid-Open No. 64-46232, a wire receiver and a wire substrate for supporting the objective lens so as to be displaceable in a predetermined direction, and the wire receiver and the wire substrate. Since the adjusting piece which is the tilt adjusting means is provided between the actuator and the base of the actuator to which it is attached, the tilt of the optical axis of the objective lens can be adjusted by tilting only the movable portion, that is, the holder and the wire receiver, of the actuator. Therefore, the above-mentioned problems do not occur. However, these tilt adjusting mechanisms do not have a means for tilting a minute amount, that is, a fine adjusting means. For example, there is no fine adjustment member for sliding the wire receiver in the circumferential direction of the cylindrical surface of the adjustment piece, or for rotating the adjustment piece with respect to the base about the boss by a small amount. For this reason, an adjustment operator directly touches the wire receiver for the adjustment. There is a problem that fine adjustment cannot be performed by such adjustment.

Further, since the wire board, the wire receiver, and the adjustment piece are tightened with the fixing screws after the tilt adjustment, the wire board, the wire receiver, the adjustment piece, etc. move due to the tightening torque of the screw, and the adjustment man-hour is reduced. There will be a problem that it will increase. SUMMARY OF THE INVENTION It is an object of the present invention to solve the various problems described above and to provide an optical pickup provided with a fine adjustment means in an optical pickup having an inclination adjusting mechanism capable of adjusting the inclination of the optical axis of an objective lens by a single actuator.

In addition to the above object, it is another object of the present invention to provide an optical pickup capable of easily performing an inclination adjusting operation performed by the fine adjusting means. Further, in addition to the above objects, it is an object of the present invention to provide an optical pickup in which an inclination adjusting mechanism including the fine adjusting means can be manufactured at low cost.

[0012]

In order to achieve the above object, the present invention provides: Objective lens, holder for holding the objective lens, actuator for driving the objective lens in a predetermined direction, support member for movably supporting the objective lens in a predetermined direction, and actuator to which the support member is attached In an optical pickup in which a spherical surface centered on the principal point of an objective lens is formed on at least one of the base and the supporting member and the actuator base, and the supporting member slides on the spherical surface, the supporting member is arranged in the optical axis direction. Pressing means for pressing in a first direction parallel to the direction of the spherical surface, and pressing means for pressing the support member in a second direction opposite to the first direction and the spherical direction, and adjusting the pressing force thereof. An optical pickup comprising a pressure adjusting means.

2. The optical pickup according to claim 1, wherein a surface of the support member that is pressed by the pressing adjusting means is a first inclined surface that faces the second direction and the spherical direction. 3. The optical pickup according to claim 2, wherein the surface of the support member that is pressed by the pressing means is a second inclined surface that faces the first direction and the spherical direction.

4. In the optical pickup described in item 3, the pressing means is an elastic member. 5. In the optical pickup described in the fourth item, the elastic member is a leaf spring. 6. In the optical pickup described in the fifth aspect, the pressing direction of the pressing adjusting means is parallel to the optical axis direction. 7. In the optical pickup described in the sixth item, the pressure adjusting means is two screws.

8. In the optical pickup described in the seventh aspect, a sliding member is interposed between the pressure adjusting means and the supporting member. 9. In the optical pickup described in the seventh aspect, a leaf spring integrally formed with the pressing member is interposed between the pressing adjusting means and the supporting member. 10. In the optical pickup described in item 7, the screw has a hemispherical tip.

[0016]

According to the present invention, the objective lens, the holder for holding the objective lens, the actuator for driving the objective lens in the predetermined direction, the support member for movably supporting the objective lens in the predetermined direction, and An actuator base to which a supporting member is attached, and an optical pickup in which at least one of the supporting member and the actuator base has a spherical surface centered on the principal point of the objective lens, and the supporting member slides on the spherical surface, Pressing means for pressing the member in a first direction parallel to the optical axis direction and the spherical direction, and pressing the support member in a second direction opposite to the first direction and the spherical direction, and By providing a pressing adjusting means capable of adjusting the pressing force, the supporting member is pressed toward the actuator base and the supporting member is supported. The position of the wood is intended for adjusting the inclination of the optical axis of the objective lens by finely adjusted by the pressing means and the pressure adjusting means.

[0017]

Embodiments of the present invention will be sequentially described below. (First Embodiment) FIGS. 1 and 2 show a first embodiment according to the present invention. FIG. 1 is an exploded perspective view of the optical pickup of the present embodiment, and FIGS. 2A and 2B are sectional views showing an adjustment state of an optical axis tilt adjusting mechanism of an objective lens. The objective lens 1 is fixed to the objective lens holder 2. In addition to this, the objective lens holder 2 has focusing coils 3 and 2 as well.
One tracking coil 4, two printed wiring boards 5
Are attached, and the terminals of the focusing coil 3 and the tracking coil 4 are connected to the printed wiring board 5. The movable part 6 of the actuator is composed of an objective lens 1, an objective lens holder 2, a focusing coil 3, a tracking coil 4, and a printed wiring board 5. The movable part 6 is attached to the movable part support member 8 via four support springs 7. Two of these support springs 7 are soldered to each printed wiring board 5,
It is electrically connected to the focusing coil 3 and the tracking coil 4. When it is desired to drive the objective lens 1 in the focusing direction or the tracking direction, a drive current is supplied to the focusing coil 3 and the tracking coil 4 via the support spring 7.

The fixed portion 8a for fixing the support spring 7 of the movable portion support member 8 is formed with a concave portion, and the inside thereof is filled with a viscoelastic material such as silicon gel, silicon rubber or butyl rubber. Absorbs the vibration of. On the side where the support spring 7 is attached to the movable part support member 8, there is an optical axis downward (Fo (-) direction in the figure) and an upper slope 8b facing the spherical direction (Tan (+) direction) described later and the optical axis. Direction Upward (Fo (+) direction in the figure) and spherical direction (Tan
A lower slope 8c facing the (+) direction is formed, and a spherical projection 8d centering on the principal point of the objective lens 1 is formed on the back side where they are formed.

The carriage 9 is equipped with an actuator and a micro-optical unit 10, and has a main bearing 9a and a driven bearing.
9b are formed respectively and are supported by the main shaft 21 and the driven shaft 22 and are movable in a direction orthogonal to the track of the information recording medium (not shown), that is, in the tracking direction. The micro-optical unit 10 contains a laser diode that emits a laser beam, a hologram or a crystal element that separates the laser beam, a photodetector that converts the laser beam into an electric current, a signal processing circuit, and the like. The carriage 9 has a movable part support member 8
The actuator base 9c, which is a spherical seat corresponding to the spherical projection 8d, and a column 9d for fixing a leaf spring 14 which is a pressing means described later at a position facing the actuator base 9c, and the micro optical unit 10 are emitted. The mirror base 9e for fixing the mirror that raises the laser beam to the objective lens direction is integrally formed. Carriage 9
The spherical seat of the actuator base 9c and the spherical projection 8d of the movable portion support member 8 formed on the both are spherical surfaces having the same radius with the principal point of the objective lens 1 as the center. Carriage 9
As the material of the above, high-rigidity resin such as polyphenylene sulfide, liquid crystal polymer, and epoxy resin is suitable.

The magnetic flux generating means 11 of the magnetic circuit in the actuator is composed of a U-shaped soft magnetic material yoke 12 and a permanent magnet 13 fixed to it, and is attached to the carriage 9. The magnetic flux generating means 11 is a focusing coil
The movable portion 6 is driven in the focusing direction or the tracking direction in cooperation with 3 or the tracking coil 4.

A leaf spring 14 as a pressing means is fixed to a column 9d of the carriage 9 by a set screw 15. The leaf spring 14 is made of metal or synthetic resin. Further, two screw holes 16 are formed in the vicinity of the actuator base 9c of the carriage 9 in parallel with the optical axis direction, and a screw 17 as a pressure adjusting means is screwed into the screw hole 16 and the tip of the screw 17 is slid. A spacer 18 as a moving member is located. A V-shaped groove 18a is formed along the tracking direction at a position where the screw 17 of the spacer 18 abuts, and the position where the screw 17 abuts is made constant. A surface 18b that slides on the lower slope 8c of the movable portion support member 8 is formed on the spacer 18, and this surface 18b is a slope that slides on the lower slope 8c. The spacer 18 contains polytetrafluoroethylene or carbon and is made of synthetic resin with reduced friction. The screw 17 is good with a slotted and a pointed set screw. The spacer 18 can be moved in a direction parallel to the optical axis by screwing the screw 17.

Actuator base 9c
To fix to the leaf spring fixed to the pillar 9d with the set screw 15
The upper slope 8b of the movable part support member 8 is pressed by one end of 14, and the spacer 18 is moved up or down by screwing the screw 17 to press the lower slope 8c. The main shaft 21 and the driven shaft 22 are parallel to each other and extend in the same direction, and are inserted into a main bearing 9a and a driven bearing 9b of the carriage 9 to movably support the carriage 9. The surface of each shaft is coated with polytetrafluoroethylene resin to reduce sliding friction. Access coils 19 forming a part of a voice coil motor (VCM) are fixed to both sides of the carriage 9, and drive the carriage 9 in the axial extension direction in cooperation with magnetic flux generating means (not shown).

Next, the tilt adjustment of the optical axis of the objective lens will be described with reference to FIGS. 2 (a) and 2 (b). 2A is a cross-sectional view showing a state before the tilt adjustment, and FIG. 2B is a cross-sectional view showing a state after the tilt adjustment. In the state of FIG. 2A, the spacer 18 is lowered until it comes into contact with the bottom portion of the carriage 9, and the movable portion support member 8 is also positioned below due to the pressing force of the leaf spring 14. Since this pressing force acts vertically on the upper slope 8b, it can be divided into two, a downward pressing force in the optical axis direction and a pressing force in the spherical direction. On the other hand, the pressing force also acts on the lower slope 8c and can be divided into two pressing forces, an upward pressing force in the optical axis direction and a pressing force in the spherical direction. The magnitude of the downward pressing force in the optical axis direction applied to the upper slope 8b and the magnitude of the upward pressing force in the optical axis direction applied to the lower slope 8c have the same relationship. The movable portion support member 8 is pressed by the pressing force in the spherical direction acting on both the upper slope 8b and the lower slope 8c.
The spherical projection 8d is always abutted against the spherical seat of the actuator base 9c without separating.

From this state, the screw 17 is screwed into the spacer.
18 is pushed upward in the optical axis direction. Since the surface 18b of the spacer 18 that abuts the lower slope 8c is formed as a slope, the movable portion support member 8 moves while sliding on the spacer 18 in two directions, the optical axis direction upward and the spherical direction. At this time, the flexure of the leaf spring 14 increases and the pressing force on the movable portion support member 8 also increases. That is, the pressing force in the spherical direction also increases, and the movable portion support member 8 is brought into contact with the spherical seat of the actuator base 9c (see FIG. 2 (b)).
If the two screws 17 are screwed in equally, the movable part support member
8 rotates about an axis passing through the principal point of the objective lens 1 and parallel to the tracking direction. The objective lens can be changed by changing the screwing amount of either one of the two screws 17.
It rotates about an axis passing through the principal point 1 and parallel to the track direction, that is, the tangential direction. By such screwing operation of the screw 17, the inclination of the optical axis of the objective lens 1 can be adjusted. After the adjustment, the movable portion support member 8 and the actuator base 9c are bonded and fixed with an adhesive such as a photo-curing adhesive.

According to the present embodiment, the movable part support member 8 of the actuator is pressed downward in the optical axis direction and the spherical direction by the leaf spring 14, and the screw 17 is screwed through the spacer 18 to support the movable part. The member 8 is pressed upward in the optical axis direction and in the spherical direction to support the movable part 6, and the tilt of the movable part 6 is adjusted to adjust the tilt of the optical axis of the objective lens 1. The tilt of the axis can be adjusted.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to (b). FIG. 3A is a sectional view showing a state before adjusting the inclination, and FIG. 3B is a sectional view showing a state after adjusting the inclination. In this embodiment, the screw 17 and the movable part support member
A U-shaped leaf spring 20 integrally formed with the pressing means was used as a sliding member between the sheet springs 8 and 8. In this U-shaped leaf spring 20, the upper leaf spring 20a serves as a pressing means, and the lower leaf spring 20b
Functions as the spacer 18 in the first embodiment. The distance between the upper leaf spring 20a and the lower leaf spring 20b is smaller than the distance between the upper sloped surface 8b and the lower sloped surface 8c of the movable part support member 8, and is always a U-shaped leaf spring. 20 presses the upper slope 8b and the lower slope 8c of the movable part support member 8. The carriage 9 is fixed to the pillar 9d by adhesion or press fitting. The tilt adjusting work is almost the same as that of the first embodiment, and therefore its explanation is omitted.

According to this embodiment, in addition to the effects of the first embodiment, the number of parts can be reduced and the manufacturing can be performed at low cost.
Next, a third embodiment of the present invention will be described with reference to FIGS. 4 (a), (b) and (c).
Will be described with reference to. 4A is a cross-sectional view showing a state before tilt adjustment, FIG. 4B is a cross-sectional view showing a state after tilt adjustment, and FIG. 4C shows shapes of an actuator base and a movable portion support member. It is a perspective view. In this example, the screw 17 '
Is brought into direct contact with the lower slope 8c of the movable part support member 8 to press the movable part support member 8. The screw 17 'used here has a hemispherical tip so as to prevent the screw 17' from biting into the lower slope. Further, when the screw 17 'is screwed, a pressing force acts on the movable portion support member 8 in the tracking direction (the direction perpendicular to the paper surface in FIG. 4B), so that the protrusion 9f is formed almost in the center of the spherical seat of the actuator base 9c. A groove 8e that engages with the projection 9f is formed on the circumference of the spherical projection 8d of the movable portion support member 8 in the optical axis direction and the track direction. In this way, the movable part support member 8
Even if a force in the tracking direction acts on the movable portion support member 8 due to the engagement between the protrusion 9f and the groove 8e, the movable portion support member 8 does not move in the tracking direction. Incidentally, the formation of the protrusion and the groove is not limited to the above relationship, and may be reversed.

The inclination adjusting work is substantially the same as that of the first embodiment, and therefore its explanation is omitted. According to the present embodiment, in addition to the effects of the first embodiment, a sliding member such as a spacer is not required, so that the number of parts is reduced and the manufacturing cost can be reduced. The invention is not limited to the embodiments described above. In each of the above embodiments, both the sliding surface of the movable portion support member 8 and the actuator base 9c are spherical surfaces with the principal point of the objective lens 1 as the center, but at least only one has the principal point of the objective lens 1 as the center. Any spherical surface having the same radius may be used. For example, one spherical projection and the other at least 3
Alternatively, one protrusion may be formed, or one may be a spherical seat and the other may be at least three protrusions. Further, if the tilt adjustment direction of the optical axis of the objective lens is uniaxial, the tilt adjustment of the optical axis of the objective lens can be easily performed by the fine adjustment means capable of fine adjustment even if the spherical projection or the spherical seat has a cylindrical shape.

In each of the above embodiments, the leaf spring is pressed against the upper slope of the movable part support member and the screw is pressed against the lower slope.
Even if the screw is pressed on the upper slope and the leaf spring is pressed on the lower slope, the inclination of the optical axis can be easily adjusted. Further, in each of the above-described embodiments, the upper slope is formed on the movable part support member, but what kind of movable part support member is used as long as the movable part support member is pressed in the two directions of the downward direction of the optical axis and the spherical surface direction? It may have a shape. Similarly, on the lower slope of the movable part support member, the movable part support member has two parts in the upward direction of the optical axis and the spherical direction.
Any shape may be adopted as long as it is pressed in the direction. This also applies to the pressing direction of the screw. In each of the above embodiments, the lower slope is formed so that the screw presses the movable part support member in parallel with the optical axis direction.
If the movable part support member is pressed so as to be pressed in the above two directions, it need not be particularly parallel to the optical axis direction.

The optical pickup of the present invention can be applied to a device for optically recording or reproducing information, such as an optical disc device or a magneto-optical disc device.

[0031]

According to the optical pickup of the first aspect of the present invention, fine adjustment means can be provided. According to the optical pickup of claims 2 to 8 of the present invention,
In addition to the effect of the first aspect, the work of adjusting the inclination of the optical axis of the objective lens by the fine adjustment means becomes easy.

According to the optical pickups of the ninth to tenth aspects of the present invention, in addition to the effects of the second to eighth aspects, the manufacturing cost of the optical pickup is reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an optical pickup according to a first embodiment of the present invention.

2 (a) and 2 (b) are cross-sectional views showing an adjustment state of a jig for adjusting the inclination of the optical axis of the objective lens according to the first example of the present invention.

3A and 3B are cross-sectional views showing an adjustment state of a jig for adjusting an optical axis tilt of an objective lens according to a second example of the present invention.

4 (a) and 4 (b) are cross-sectional views showing an adjustment state of an optical axis tilt adjusting jig of an objective lens according to a third embodiment of the present invention, and FIG. 4 (c) is a third embodiment of the present invention. It is a figure which shows the actuator base and movable part support member concerning.

5A is an exploded perspective view showing a conventional example, and FIG. 5B is a sectional view thereof.

FIG. 6 is an exploded perspective view showing a conventional example.

[Explanation of symbols]

 1 Objective lens 2 Holder 3 Focusing coil 4 Tracking coil 5 Printed circuit board 6 Moving part 7 Wire 8 Moving part supporting member 8a Wire fixing part 8b Upper slope 8c Lower slope 8d Spherical protrusion 8e Groove 9 Carriage 9a Main bearing 9b Driven bearing 9c Actuator base 9d Pillar 9e Mirror base 9f Protrusion 10 Fixed optical unit 11 Magnetic flux generator 12 Yoke 13 Permanent magnet 14 Leaf spring 15 Set screw 16 Screw hole 17 Screw 17 'Hemispherical screw 18 Spacer 18a V-shaped groove 18b Slope 19 Access coil 20 U-shaped leaf spring 20a Upper leaf spring 20b Lower leaf spring 21 Main shaft 22 Driven shaft

Claims (10)

[Claims] 1. An objective lens, a holder for holding the objective lens, an actuator for driving the objective lens in a predetermined direction, a support member for movably supporting the objective lens in a predetermined direction, and the support. An actuator base to which a member is attached, and an optical pickup in which at least one of the support member and the actuator base has a spherical surface centered on a principal point of an objective lens, and the supporting member slides on the spherical surface, Pressing means for pressing in a first direction parallel to the optical axis direction and in the spherical direction, and for pressing the support member in a second direction opposite to the first direction and the spherical direction and pressing the same. An optical pickup comprising a pressure adjusting means capable of adjusting pressure. 2. The optical pickup according to claim 1, wherein
The optical pickup characterized in that a surface of the support member to be pressed by the pressing adjusting means is a first inclined surface facing the second direction and the spherical direction. 3. The optical pickup according to claim 2, wherein
An optical pickup, wherein a surface of the supporting member that is pressed by the pressing means is a second inclined surface that faces the first direction and the spherical direction. 4. The optical pickup according to claim 3,
The optical pickup, wherein the pressing means is an elastic member. 5. The optical pickup according to claim 4,
An optical pickup in which the elastic member is a leaf spring. 6. The optical pickup according to claim 5,
The optical pickup, wherein the pressing direction of the pressing adjusting means is parallel to the optical axis direction. 7. The optical pickup according to claim 6,
The optical pickup, wherein the pressure adjusting means is two screws. 8. The optical pickup according to claim 7,
An optical pickup characterized in that a sliding member is interposed between the pressure adjusting means and the supporting member. 9. The optical pickup according to claim 7,
An optical pickup characterized in that a leaf spring integrally formed with the pressing member is interposed between the pressing adjusting means and the supporting member. 10. The optical pickup according to claim 7, wherein the screw has a hemispherical tip.